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AleksAgata [21]
4 years ago
10

An object is launched at 25 m/s from a height of 80 m. The equation for the height (h) in terms of time (t) is given by h(t)= -4

.9t^2 + 25t + 80. What is the objects maximum height?
Mathematics
1 answer:
Reptile [31]4 years ago
5 0
Use the formula for finding axis of symmetry:


        -b           -25         -25         
x = ------  ⇒ --------- = -------- = 2.6 
       2a         2(-4.9)     -9.8



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To solve this problem and calculate the area of the sphere, you must apply the following formulas:

 Formula N° 1:

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 r is the radius.

 Formula N° 2:

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 As you can see, you don't have the value of the radius "r". So, you must rewrite the Formula N° 1, and clear "r":

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 Then, to calculate the area of the sphere, you must substitute the value of "r" into the Formula N° 2:

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 <span>What is the surface area of the sphere to the nearest square meter?
</span>
 The answer is: 2,158 m²
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